Method of treating mash



May 1l, 1937. MArER METHOD OF TREATING MASH Original Filed July 13, 1934 5 Sheets-Sheet 1 lng Afro/mf rs Horizontal Knives `Maly 1l, 1937. v E. MA YER V 2,080,287

METH-OD OF TREAT ING VMASH Original Filed July 13, 1934 3 Sheets-Sheet 2 Center Line and Sickle-Samy Zig Zas Knive 94 /L-/G 9. /NVEN ron.-

foMz//vo MA rif? A Trop/v rs May 11, 1937. E. MA'fER 2,080,287

METHOD OF TREATING MASH Original Filed July 13, 19154 3 Sheets-Sheet 5 m, l W

VPatented May ll, 1937 PATENT OFFICE METHOD F TREATING MASH Edmund Mayer, Ulm

A. D., Germany Original application `July 103, 1934, Serial No. 735,010. Divided and this application August 29, 1935, Serial No. 38,416

7 Claims.

This invention, as indicated, relates to a method of treating mash, and is a division of copending application Serial Number 735,010, led July 13, 1934, Patent No. 2,014,945, issued September 17, 1935. More particularly, it comprises the process of so treating crushed or ground grain for infusing. and extracting the same as to secure the maximum amount of extract with the shortest period of treatment. It

10 also includes the provision of special equipment to facilitate the uniform and rapid treatment of crushed and ground grain With extraction fluid and with means for agitating and severing the bed of material undergoing treatment.

This invention also has in view the provision of means for stirring, ploughing, cutting and grain-loosening action for the apparatus. It further contemplates the provision of a horizontal cutting knife for application to the mass un- 20 dergoing treatment and blades for treating or movingthe same.

The invention also contemplates draining the grain bed uniformly as to equal areas and in such manner as to prevent formation of drainage .35 channels or separation of the grain layer by pressure head or suction head in the liquid being drawn from the grain bed.

The invention also has in view the arrangement of the means for treating the material in 30 such manner that the subdivision of the bed of material will be carried on successively by different implements. Thus, the plough, sickle, and zigzag knife may follow each other in the order stated, or the plough zigzag knife and sickle 35 may be arranged to follow one another in accordance with the character of the material to be treated and the various other `factors entering into the special work in hand.

Heretofore, apparatus for treating grain has 40 been provided, but such apparatus has not been so arranged as to provide for substantially uniform treatment of every individual portion of the bed of material undergoing treatment. Such apparatus heretofore used has concentrated more 45 stirring action around the material in the central portion of the apparatus than about its margins, and the infusing of liquid with the mass and the removal of extract therefrom has been without Y, control as to the several different portions of the U" material undergoingtreatment. The principal object of the present invention isto provide a novel method of treating material to be extracted so that the maximum of extract may be obtained within a minimum period 'm of treatment.

Another object of the invention is to provide" concentric zones or areas of treatment for a bed of material so vthat the treatment within each of G0 said areas will be substantially uniform irrespective of the distance of such several areas from the center of the apparatus.

Another object of the invention is to provide a method for treating and withdrawing extract from material to be extracted which may be used with various types of apparatus and which will operate with maximum eiciency and minimum period of time and will operate upon widely distributed areas of the material undergoing treatment with substantially uniform effect, ir-

V respective of the position of such areas with reference to the center of the apparatus.

Another object of the invention is to provide a method for treating mash, and the like, that may be carried out, among other Ways, by an apparatus which will combine within a single machine a variety of cutting and stirring devices So related to each other that their mutual relation to the material undergoing treatment will have the most beneficial effect in producing uniformity of treatment.

Another object of the invention is to provide a method of treating mash, and the like, that may be carried out, among other` ways, by an apparatus of sturdy construction which will withstand severe usage and which will be adapted within itself to carry out all the necessary steps required for the withdrawing of extract crushed and treated grains as a step in the process of brewing.

A further object of the invention is to provide a method of treating mash, and the like, that may be carried out among 'other Ways, by an apparatus having a plurality of rotating, arms carrying vertical knives and ploughs and horlzontal knives with sickles adapted to operate suecessively upon adjacent portions of a bed of grain undergoing treatment and also to provide a blade adapted to -be used as a mashing blade to coact with other elements in separating and distributing the material or to be used as a spent grains blade for Vclearing the apparatus of the material after it has been finally extracted to the desired extent.

A further object of the invention is to so distribute and proportion the number of drainholes in each of the concentric areas as Well as the diameter of such drain holes and the size of the individual false bottom fields or areas for the. infusion or extraction of material undergoing treatment as to provide for substantially uniform treatment of the material irrespective of its particular position within the apparatus.

A further object of the invention is to provide a method treating mash, and the like, that may be carried out, among other ways by an apparatus providing for visible inspection of the draining operation and at the same time lowering the pressure head or suction head.

Other and further objects of the inventionvwill appear in the course of the following description.

. The annexed drawings and the following de scription set forth in detail the means and mode of carrying outI the invention, such disclosed means and mode illustrating, however, but several of the diierent ways in which the principle of the invention may be used.

In said annexed drawings:

Figure 1 is a side elevation, partly in section, taken along the line I I, shown in Figure 3, looking in the direction of the arrows, showing one form of apparatus embodying the principles of the invention;

Figure 2 is a fragmentary side elevation, partly in section, taken-along the line 2 2, shown in Figure 3, looking in the direction of the arrows;

Figure 3 is a top plan view, partly in section,

taken along the line 3 3, shown in Figure 1,

looking in the direction of the arrows;

Figure i is a plan view, partly in section, taken along the line 4 4, shown in Figure 1, looking in the direction of the arrows;

Figure 5 is a plan View, partly in section, on a reduced scale, similar to Figure 3, showing an apparatus having two supporting arms;

Figure 6 is a side elevation in enlarged detail, taken along the line 6 6, shown in Figure 3, looking in the direction of the arrows, showing the horizontal knife adjustingmeans;

Figure 'I is an enlarged detail View, partly in section, taken along the line 1 1, shown in Figure 6, looking in the direction of the arrows, and showing one of the plough points;

85 Figure 8 is a schematic projection showing the positioning and successive action ofthe severing and subdividing elements for the grain bed;

Figure 9 is a schematic diagram showing the cutting action which takes place under different 40 vertical adjustments of the mechanism;

Figure 10 is an enlarged vertical sectional view, taken along the line III-I0 shown in Figure 4,

looking in the direction of the arrows;

Figure 11 is a, fragmentary front elevation 45 showing the valve units illustrated in Figure 10;

Figure 12 is a plan view of one of the plates of the false bottom; l

Figure 13 is a sectional view`of the false bottom taken along the line I3 I3 shown in Figure 50 12, looking in the direction of the arrows;

Figure 14 is an end view of the structure shown in Figure 12, taken along the line M Il, looking in the direction of the arrows;

Figure 15 is an enlarged fragmentary view 55'showing a portion of one of the false bottom plates as seen from below; t

Figure 16 is a, fragmentary sectional view taken along the line I6 |6 shown in Figure 15, looking in the direction of the arrows;

o Figures 17 and 18 are fragmentary views ofthe under sides of the respective terminal plates of a concentric series of false bottom plates showing the locking elements;`

Figure 19 is an enlarged sectional detail view,

55 taken along the line I9 I9, shown in Figure 17,

` looking in the direction of the arrows, showing the construction of one of the locking lugs; and Figure 20 is an enlarged sectional. detail view,

taken along the line 20 20, shownin Figure 17,"

70 looking in the direction' of the arrows, showing the plate lifting socket.

i Asis clearly shown in Figures 1, 2 and 3 of the drawings, the container I, which comprises the combined mash and drain tub, is in the form 75 of a cylindrical receptacle of greater width than height and positioned vertically upon a substantial support in the form of crossed beams 2, l, supported on members I so as to provide space beneath the apparatus for the driving mechanism shown as in the form of an electric motorl 5 and a transmission 6 in the form o f a reduction gear mechanism for driving the vertical shaft 1. The drive shaft 1 extends through ahollow hub member or sleeve 8 and has secured to its ,upper portion a cross-head 8 having\a series of 1 is received within a cylinder I4 of a hydraulic f lifting mechanism I5 positioned axially beneath the same, whereby vertical adjustment of the plane of operation of the arms and their as-' sociated mechanism is readily provided for.

The upper end of the shaft 1 preferably terminates in a point I6 usually termed a needle, which provides a bearing for the sparging apparatus I1. The sparging apparatus may be of conventional form having a receptacle or reservoir I8 supported on the needle and having a4 plurality of arms I9 connected with the lower portion of the reservoir and extended radially outward toward the side walls of the mash and drain tub. The arms I9 are in the form of tubes having a series of perforations 2l preferably on one side, the number of such perforations preferably increasing toward the outer ends of said arms so as to provide for afgreater distribution of liquid over the outer areas ofthe grain bed. The tubular arms' are provided at their ends with caps- 22, and suitable supporting webs 23, and guy wires or rods 24 may be provided to rigidly support the tubular arms. A supply of liquid for the reservoir of the sp'arglng apparatus may be provided by means of a pipe (not shown) which may be supported above the same. The number bf tubular arms for the sparging apparatus may be varied 'as desired, and ordinarily will be equal to the number of arms mounted on the cross-head of the mechanism for subdividing and distributing the grain, bed.

The container may have a central vent 25 and is preferably closed yat its upper side and is provided with sliding doors 26 which when opened provide ample 'space for inspection of the contents of the apparatus as well as means for obtaining access to the hand-wheels and associated mechanism carried by said'supporting arms, as will be presently described.

In the form illustrated, the apparatus is made of metal and is preferably providedwitli a belt of insulating material (not shown) around its sides and also preferably has a circular walk 21 affording access to the sliding doors. The container is formed with a bottom, hereinafter referred to as a "true bottom 28, and a false bottom 29 of shallow depth which is divided into a plurality of independent false bottom elds or areas concentrically arranged about the central hub member extending through such bottom. The particular construction of a preferred type of false bottom will be presently described.

`fectiveness over the entire bottom of the con,-

tainer, in order that equal treatment of the-grain bed may be carried out and equal extraction of the wort from the grain bed be accomplished. Each of the areas referred to, as shown in Figure 4, is connected with a discharge valve or cock 31 by a pipe line 33, which in the case of large tubs like that illustrated, has a branched pipe 34 whereby each outlet at the discharge cock serves two drain areas and provides a substantially direct line of `flow from such -drain areasto the discharge cock. The plane in which the drain pipes are positioned is preferably placed closely adjacent the bottom of the container so that no head of liquid will be imposed upon the drain lines or result in displacement orf/"erosion of the grains bed during the'draining-off process. Each pipe is connected to the sterilizing manifold through a branch pipe 35, having a valve 36, the branch pipe 35 extending upwardly approximately ly the distance that the drain pipe 33 connecting with the aperture in the container bottom extends downwardly. In addition to the short connecting pipe 35, leading to the sterilizing `manifold, each pipe is provided as heretofore mentioned with a two-way valve 39, having a discharge opening 31 directly downward into the grant 33, and a dischargev opening directly upward through a gooseneck pipe 4|, and into the grant 38. The gooseneck pipe 4| preferably rises to a point slightly below the sterilizing manifold and terminates slightly below the bottom of the container, so that a gentle gravity flcwof liquid from the container may be had by discharging through thegoosene'cks.

A gooseneck is thus provided for each discharge line or pipe and as the liquid is discharged into the grant, it affords an opportunity for definitely checking the progress of the draining-off operation -and ascertaining accurately whether a clear extract is being obtained and discovering whether at any of the drain areas within the container any obstruction to the free flow or drainage of the grain bed is present. This affords a means of maintaining any liquid discharged into the grant of the desired clarity and for stopping at once the introduction of liquid from any portion!r ofthe grain bed which is not of satisfactory character.

The sterilizing apparatus comprising the manifold 32 and steam and hot water connections 12, 14, as will be hereinafter described, is provided for the freeing of the tubes or drain pipes as well as the true bottom of any underdough which may have accumulated under the false bottom during any portion of the mashing and extraction process. This may be accomplished by admitting hot water or steam into any desired pipe as from 'connections which will be presently described.

The several drain areas4 of the container, as is indicated in Figure 4, are covered with segmental plates 42 ofthe type illustrated in Figures 12 to 20. These plates are preferably formed of sheet metal of suitable composition and are plate along one` of its arc-shaped edges is provided with a strip 46 of the same height as the studs and in cooperation with companionplates in the same concentric area plates forms a sep.- arating wall completely around the container. Four such concentric areas lare shown in Figure 4, and thestrips referred to completely separate each of the concentric draining areas from the adjacent concentric draining areas. Thus any liquid drained into one concentric draining area may flow concentrically within the apparatus, but cannot flow radially. At each radial margin of the plates, interlocking elements are preferably provided. In the form illustrated, flanges are provided projecting outwardly on the under sides of said plates, there being two spaced flanges 41, 48, at one margin and a central single flange 49 at the other margin of a size to fit in the space between the two flanges on a companion plate of the same concentric series of plates. The flanges 41, 48 and 49 are spaced from the bottom by means of feet 50. It will be obvious thus that the plates may be laid in interlocking relation to each other upon the bottom of the container, and will serve to hold each other in position. The last of the-series of plates as well as the first of the series of plates, are provided with slightly different engaging elements along one radial margin, as will more clearly appear from Figures 17 and 18. In said figures, one of the plates will be noted to have a pair of semi-circular locking lugs 52, and the other plate 53 to have a iiange 54 with semi-circular cut-out areas 55 within which such locking lugs will engage, projecting fianges 55 on said locking lugs serving to engage beneath the plate adjacent the cut-out portions and securely hold the entire concentric row of plates firmly in engagement. A plate-lifting socket 51 is preferably provided in the plate 5| carrying the lifting lugs and hook member 58 may be engaged therein to lift the plate when the lugs are turned to unlock-l ing position.

The locking lugs 52 may be variously constructed, but, as shown in Figure 19, each lug may have a threaded pivot member 6| engaged in a pivot aperture 62 in the plate 5| and screwthreaded about its upper end and engaged by a screw-threaded collar 63 having holes 64 for a, Spanner wrench by means of which it can be engaged against its seat, the collar then fitting into the countersunk portion around the pivot aperture and being flush with the upper surface tion by means of a bar wrench having a square end, or by any v/other suitable implement.

The plate lifting socket 51 is formed by securing a anged cup 66 `to the underside of the plate 5| by means of rivets or pins 61. A hole 68 is provided through the plate centrally of the cup, the hole being of smaller diameter than the cup proper, to provide space within the cup for the end of the lifting hook 5B to engage the under side of the plate 5| as is shown in Figure 20.

The grant 38, as is clearly shown in Figure 4, is connected with a discharge pipe 1| leading to a wort pump whence it may discharge its contents into the kettle or back into the container or mash tub through a special conduit,.depending on the quality of the extract and the stage of the mashing or extracting process when the operation is carried on. The sterilizing manifold is connected with a steam line 12 controlled by a whereby either steam or hot water or a mixture thereof may beadmitted to the sterilizlng manifold and thence carried into the container to any desired section through any of the pipes which may be placed in communication with the sterilizing manifold by means of the valves 36 and the pipes 35 heretofore described. This operation will serve-to clear the particular draining lineof underdough. y

Beneath the container a discharge passageway or conduit 16 for extracted or spent grains can be provided and vertical spent grain chutes 11 extending upwardly therefrom and communicating with the interior of the container through the openings 10. In the apparatus shown in Figures l to 4 inclusive there are four such openings. These openings are closed by plugs or covers 19' as" shown in Figure 4. during the meshing. operation.

The apparatus for subdividing and handling the grain bed and forming planes of separation therein to permit thorough infusion of the -liquid with the grain and substantially-uniform extraction within a minimum of time, will now be described.

As has been heretofore explained the number of supporting arms I2 on the cross head 9 may `be varied as desired and the number of tubular arms I9 on the sparging apparatus may be similarly varied, each of the supporting arms is designed to carry operative elements of predetermined character such as ploughs, zigzag knives, spent grains blades, `or mash blades, horizontal knives with or without sicklesstraight blades or v various combinations or variations of these elements. The 'ploughs are preferably in the form of straight vertical shanks 8 I but may have their y i. lupper portions bent forwardly or rearwardly, the

latter being shown as the blades 82 in Figure 6 of the drawings. The shanks of the ploughs have sharp front edges as is shown Iin Figure '1 and outwardly flared triangular foot sections 64 tapered: upwardly and presenting an upwardly beveled forward portion and may be hollow at their rearward portions. The shanks of the y ploughs are preferably provided with short side knives 35 in staggered relation on opposite sides.

` The forward or cutting portions of these knives may be tapered rearwardly toward their free ends, presenting a diagonal cutting edge. The shank portions ofthe ploughs are preferably secured to the cylindrical supporting arms by means of split clampingrings 86, and alternate plough -members are preferably secured to the supporting arms in the'vertical planes ofthe forward and rearward portions of said supporting arms..

zigzag knives 9| aresimilarly attached to the forward and rearwardportions of the designated supporting arms I2`by means of split clamping rings 92. The zigzag knives. are preferably provided with triangular Ifoot sections 93 similar to the foot sections of the ploughs and may have one or more short 'side knives 94, preferably a single such knife adjacent the .foot section as shown in Figure 9.

'In addition to the luiloughs andaigzag knives Y one or more straight knives 95 may be provided on one or more of the supporting arms I2, preferably immediately -adiacent theshaft. Suchvstraight knives preferably have no triangular foot portions 'and terminate in spaced relation to the bottom.

The ploughs and :zigzag knives are preferably arranged in progressively closer relation to each pose of such closer spacing at the outer'ends of the arms is to provide for equal effectiveness of the subdividing elements upon the grain bed remote from the center, as is had by the more widely space/d elements near the center. Where such subdividing elements traverse a circular path, it is obvious that areas of the grain bed nearer the center will receive relatively more effective subdividing and infusing action than equal areas near the outer portions of the container, and that to compensate for this unequal travel, the subdividing elements will have to be proportionately more numerous adjacent the outer portion of the grain bed. Similarly, the number of draining areas and draining conduits should be relatively more numerous adjacent the the outer portion of the container to secure substantially equally. effective extraction over equal areas throughout the grain bed.

In addition to the subdividing elements atother considerations.

The method of supporting the horizontal knives with sickles is shown in Figure 6, wherein a bracket |05 is secured to the supporting arm I2 having a ixed sleeve bearing |06 for a screw shaft |01 operated by a handwheel |08. An lnternally screw--threadecl collar |09 is pivotally carried on the end of a lever pivotally supportedat an intermediate point on a bracket ||2 and at its opposite end is pivotally engaged with a supporting bar ||3 having a screw-threaded section to which is adjustably attached a bracket ||4 of the horizontal knife |03. A link ||5 is preferably pivoted on the bracket |05 at one end and to the lower portion ofthe supporting bar ||3, which with the lever provides forpositioning the knife horizontally at various levels of adjustment. The sickles |04 may be of various forms, but preferably are o f the shape shown in Figure 6.

The spent grains or mash blades lill, |02, are

j preferably supported on similar mechanism havpositioned adjacent the free ends of the supporting arms, even though in the case of the inwardly positioned spent grains or mash blade |02, its

position of the handwheel and its associated lever.

ly connected with upperlinks' |23 and lower links |24 pivotally mounted on brackets |25, |26, respectively, clamped upon the supporting arm. The pivot member for the lever comprises a bar |21 in ilxed relation to said'lever and extending parallel to thev supporting arm and such bar is xedlv engaged with the upper of such link members .|23 in each instance. The bar is pivotally supported at intervals adjacent such point of connection with the links by the brackets |25.

In such instance the blade itself is car ried on vertical supporting bars |2|, |22, pivotalsol ` points of support are positioned inwardly of the V to be noted that a bar similar to the bar |21 is used even where the lever has an extension which supports the spent grains or mash blades .same and subdivide the same.

or the horizontal knife. In such instance, as shown in Figure i, the pivot member `for the leveris associated with the bar |3| which is iixedly engagedwith said lever and extends parallel to the supporting arm to the inner bracket member '|32 in which it is pivotally mounted.

having lower members |34 are iixedly engaged upon the barv |3I, the free ends being pivotally engaged with the vertical supporting bar |35 connected with the horizontal knife at its inner end, to thusprovide for positive lifting of the inner end of the knife uniformly with the outer end thereof. A similar arrangement is provided for lifting the spent grains or mash blade through having a rbar |36 associated with an inner blade supporting mechanism |31 similar to the mechanism at the inner end of the horizontal knife just described.

Where a two-arm machine is provided, as is shown in Figure 5, the construction is substantially similar to that shown and described in connection with Figure 3. In such case, however, in place of using a pair of spent grains blades of relatively shorter length and slightly overlapping in their paths of travel, as in the construction shown in Figure 3, a single spent grains blade Ml is provided, said blade being adapted to extend completely across the false bottom and having its ends angularly disposed so as to carry the extracted grain toward the discharge chutes of the apparatus. The position of the spent grains blade MI is controlled by a handwheel |42 and associated mechanism similar to that heretofore described in connection with the spent grains and mashing blades and the horizontal knife shown in- Figure 3.

The apparatus shown in Figures 1, 2 and 3, particularly, is provided with three arms, but the number of arms provided for in any particular machine depends in a considerable extent upon the size of the apparatus. With a machine having only two arms, the outer subdividing knives and ploughs must be placed so closely together that the grain bed is liable to be bodily displaced. For this reason, it is preferable to use three arms, including a horizontal cutting knife which acts upon the grain bed upon any preferred level of subdivision, and which upon its outer portion carries as many sickles as would be .required to properly subdivide equal portions along vertical divisions. With a machine having three arms, if desired, a number of sickles may be used, but usually it will be found that the operation can be carried on so well with the other subdividing elements that no sickles at all are required. Likewise, where a four-arm machine is provided, in most instances it will be unnecessary to have sickles upon the horizontal knife, the subdivision being accomplished by means of ploughs and zigzag knives. The grain, when itis compacted on the double bottom, can be cut away from such bottom by means of the horizontal knife, and the ploughs and zigzag knives can again engage the With the horizontal knives, the grain bed can be subdivided in every horizontal level, and with the zigzag knives and ploughs the grain bed can be divided vertically. The apparatus thus provides for the proportionate functioning of the subdividing apparatus together with the proportionate functioning of the sparging apparatus and the proportionate functioning of the double bottom, so that uniformity of treatment is carried through in all instances, irrespective of whether-any particular area of the grain bed is adjacent the central portion of the apparatus or is adjacentthe outwardly disposed areas of the apparatus.

When the apparatus is of smaller size and a heavier or higher grain bed is to be used in such p apparatus, it is frequently necessary to provide special forms of ploughs and knives to suitably subdivide the grain bed.

It will be noted by reference to Figure 8, that the grain bed is divided vertically by means of a double series of ploughs on two successive supporting arms followed by zigzag knives carried on vthe third supporting arm which also carries on suitable links and brackets a horizontal knife with vertically upstanding sickles, such sickles being disposed only over the outer half portion of such horizontal knife. It will be noted that the ploughs and zigzag knives are more closely positioned adjacent the outer end of the supporting arms, and also that such subdividing elements alternate on opposite sides of the arm in the direction of motion of the supporting arm therefor. The extreme outer portion of the grain" bed will be rst subdivided by one of the ploughs on the rst supporting arm, and after it has passed through the grain bed, a plough on the second supporting arm will form a line of subdivision closely adjacent the path of travel of the first plough, and thereafter a zigzag knife on the third supporting arm will in its turn form a line of subdivision closely adjacent the path of travel of the plough on the second supporting arm, and thereafter the outermost sickle on the horizontal knife will form a line of subdivision inwardly of the outermost zigzag blade and yet outwardly of the second plough on the rst supporting arm. This methodof subdividing the grain bed in the stages just described will take piace completely across the bottom of the apparatus and will be repeated for each complete revolution of the supporting arms and their subdividing elements.

In Figure 9 there is shown the different horizontal levels at which the subdividing elements may be adjusted tov operate. The horizontal fe maybe independently adjusted to operate at any desired level and likewise the spent grains blade when used as a mashing blade may be adjusted to any desired horizontal level. As has been explained, the ploughs carry` short horizontal knives alternating in staggered relation on the respective sides and the zigzag knives may likewise carry one or more such short horizontal knives. The diagram shown in Figure 81s merely illustrative and is not intended to set forth an essential arrangement of lthe ploughs and zigzag knives and sickles, nor to restrict the apparatus to the combination of these various elements, inasmuch as for certain purposes special elements may be required or a larger number of some of these elements and none of the others. Therefore, the proportion of each of the/,subdividing elements or their arrangement is a matter to be adjusted in accordance with the work in hand to secure the best results, varying with the character of the material to be handled, the size of 'I'he apparatus above described is adapted 'for use in connection with any of the standardpractices used in connection with the production of malt liquors and. also is adapted for ing the grains bed over a circular area, and supuse with certain-special operations and processes as may be in use in certain plants as individual practices,'and it is not intended to limit the use of the apparatus in any way for any purpose for which it may be found useful. It will be found, however, that through the use of the apparatus along the lines which have been explained,v a most highly eicient method of extracting the maximum amount of wort in a minimum amount of time consistent with a high quality product is provided for. In this way the invention includes the method of extracting wort from grains which comprises the steps ofl spreadly equal. access of moisture to all parts of "the,

grains bed; and'dralning the extract from the grains bed over substantially equal Vareas of the grains bed along a plurality of individual lines each having a small pressure head.

features of the invention instead of thosehere explained,- change being made in the means and 1. A methodof extracting'wort from malted material containing grains, in the form of a `grain bed which comprises the stepsof spreading the grain bed over a circular area, supplying liquid tovsaid grain bed, forming successive subdivisions inthe grain bed along circular paths,

Athe number of such subdivisions increasing progressively'from the center to permit thorough and substantially equal access of moisture to all parts thereof, and draining the extract fromgthe grain bed over substantially equal areas of said grain bed downwardly therethrough.

2. Amethod of extracting wort from malted material containing grains, in the form of a' grain bed-which comprises the steps ci.' spreading the grain bed over a circular area, supplying aqueous liquid to said grain bed, forming successive subdivisions in the grain bed along circular paths, the number of such subdivisions increasing progressively from the centerto permit thorough and substantially equal access of moisture to all parts thereof, and draining the extract from the grain bed over substantialk equal areas of said.'

grain bed-downwardly therethrough along a plu-` rality of individual lines each closely adjacent an individual drainage area.

3. A method of treating Ymaltedmaterial which-f comprises placing said material in a-layer in af` substantially equal access of moisture to all.- parts thereof, and draining the extract -from the ma- 4. A method of treatm'gsxaitea ymaterial which comprises placing said material in a layer in a closed container, supplying liquid'to said layer o f material andl loosening and cutting said material along substantially vertical circular paths of subdivision, the number of such subdivisions increasing progressively from the center along a radial line of movement, and thereafter cutting said material along substantially vertical circular paths of subdivision oiset radially from the paths of subdivision Vfirst formedA to permit thorough and substantially equal access of moisture to all parts of said material and draining the extract from the material downwardly therethrough over substantially equal areas thereof.

5. A method of treating malted material which comprises placing said material in a layer iny a closed container, supplying liquid to'said layer of material and loosening and cutting said material along substantially vertical circular paths of subdivision, the number of such 'subdivisions increasing progressivelyfrom the center along a radial line of movement,and thereafter successively cutting said material along substantially vertical circular paths' of subdivision offset radially from the paths of subdivision previously Other forms may be employed embodying the traversed until the entire area of said material has been divided along closely adjacent :paths Ysuccessively traversed to permit thorough and substantially equal access of moisture to all. -parts of said material and draining the extract from the'material downwardly therethrough over substantially equal areas thereof.

6. A method o'f extracting wort from malted materialI containing grains, in the form of a grain bed which comprises the steps of spreading the grain bed over -a circular area, supplying liquid to said grain bed and loosening and cutting said: grain bed along substantially vertical circular paths of subdivision, the number of such subdivisions increasing progressively from the cenof said material and draining the extract from the material downwardly therethroughv over substantially equal areas thereof.

'1. A method of extracting Iwort from malted material containing grains, in the form of a-grain bed which comprises the steps of spreading the grain bed-over a circular area, supplying liquid to said layer of grain bed and loosening and cutting said grain bed alongseriesof substantially vertical and horizontal circular paths of subdivision, the number of such subdivisions increasing progressively from the center along a radial line ofmovement, and thereafter cutting said material .along series of subtantially vertical and horizontal circular paths of subdivision oilset radially from the paths of subdivision previously formed `to permit thorough vand substantially equal access of moisture to all parts of said ma.-

terial and draining the extract from the material i downwardly therethrough over substantially equal areas thereof. 

